Dispositions and Acquisitions - Additional Information (Detail) - USD ($)	9 Months Ended
Sep. 30, 2020	Sep. 30, 2019
Business Acquisition [Line Items]
Acquisition, cash paid		$ 0
Aggregate cash proceeds from divestiture of businesses	$ 8,000,000
Behavioral Health Care Facility
Business Acquisition [Line Items]
Aggregate cash proceeds from divestiture of businesses		$ 7,000,000
Real Estate and Other Assets \| Nevada
Business Acquisition [Line Items]
Acquisition, cash paid	$ 52,000,000

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585

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- Definition

This element represents the cash inflow during the period from the sale of a component of the entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3179-108585

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